The dataset used in this study has been introduced by Johnson et al. (2020) [1]}. Each node of the network is a Facebook page, and edges represent a page recommending (i.e. “fanning”) another fan page. Therefore, a Facebook user can see the out-link as a recommendation from an authority that he or she supports. The data are collected in 2019: for each page we know its connections to other pages, its popularity (the number of followers), and the faction it supports (pro-vaccines, anti-vaccines or neutral). A neutral page is a page that is involved in the debate around vaccination, but has not expressed a clear side.
